Optimization of the modified Sagnac imaging interferometer for full compensation

Yuanhe Tang; Guangde Chen; Chunmin Zhang; Yunlong Lin; Hanchen Liu; Kai Liu

doi:10.1117/12.725182

11 January 2007 Optimization of the modified Sagnac imaging interferometer for full compensation

Yuanhe Tang, Guangde Chen, Chunmin Zhang, Yunlong Lin, Hanchen Liu, Kai Liu

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62791G (2007) https://doi.org/10.1117/12.725182
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

The modified super-wide-angle Sagnac interferometer (SASI) is designed for upper atmospheric wind measurement. The formula of SASI's optical path difference (OPD) is derived, in which the OPD versus the sine series of incidence angle in order of 4. The SASI's fully compensations of super-wide-angle, achromatic, thermal, wavelength-independent thermal conditions have been investigated. The SASI configuration for the above compensations was successfully setup by selecting correct glasses from the 113 kinds of glasses. The optimized SASI is made of ZBaF17 and QF14 glasses, and the arm lengths are accurately configured. Based on the configuration of glass types and arm lengths of SASI, it shows that SASI achromatic condition is satisfied synchronously for three aurora's emission lines, which are 557.7nm, 630.0nm and 732.0nm respectively. The relative error of SASI's lengths does not exceed 1%. The full field of view (FOV) of the SASI is 6°. It is about 5° in full angle from SASI optical axis to CCD farthest corner. The first order fringe occupies about 67% of the CCD area.

Citation Download Citation

Yuanhe Tang, Guangde Chen, Chunmin Zhang, Yunlong Lin, Hanchen Liu, and Kai Liu "Optimization of the modified Sagnac imaging interferometer for full compensation", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62791G (11 January 2007); https://doi.org/10.1117/12.725182

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